To go online with your old DS(i) games again, make sure you have a network they can connect to, then go to the Nintendo WFC settings, which can be accessed from any game with WiFi functionality. DSi or 3DS devices can be set up the same way. To also allow DSi (Enhanced) games and DSiWare access to the internet (with the bonus of WPA/WPA2 network connectivity), go to the DSi/3DSâ€™s system settings and change the WiFi connections from there. In the 3DSâ€™s case, look under â€˜Nintendo DS connectionsâ€™. In the settings for the network of your choosing, go to where it says â€˜Auto-obtain DNSâ€™ and change this to â€˜Noâ€™, then set the Primary DNS to 178.62.43.212, and the Secondary DNS to 1.1.1.1. Save these settings, and start playing online again!

Thanks to shutterbug2000 and Kaeru Team for discovering this security flaw and hosting the servers.

This is really great. Will have to change my router configuration just to test it out.

Hoping it will revive the community!

Edit:

I tried it here and it just froze my game. Have you guys tried?

When did it freeze? Does it happen every time? I'd be surprised connecting to WiFi would freeze a game, but you never know.

I don't think the community will be revived, unfortunately, but at least enthusiasts can now play together again online. In fact, I probably won't use the online functionality a lot, but the fact that the option exists once again is really nice.